Appears to be a re-opened investigation at this point. Maybe he done it, maybe he din't. Who knows until the investigation is concluded?
The perp is dead ~ the other guys ~ were they Jewish perhaps?
It's not much of a stretch to think the 9/11 anniversary played a significant role in the Tsarnaev brothers antisemetic jihad wet dreams.
Drudge also noted:
Also note . . .
Christopher Medeiros of Arlington and his roommate, Elizabeth Jason, said yesterday [9/15/2011] by phone that they were longtime friends of Mess. They said he told them Friday about a violent altercation he had the week before with his girlfriend. They said that, according to Mess, his girlfriend threw knives and beer bottles at him after he refused to talk with guests that she had brought to the apartment.link
Although we do not know the identity of Mess's knife-throwing girlfriend, we do know that one of the Tzarnaev sister's residences (West New York, NJ) was raided by the FBI).